424 AYES. 



White; a fawn-coloured spot on the cheek and side of the neck; 

 breast, back, tail, and part of the wing black. Of all the European 

 Ducks, this has the shortest bill. Its trachea, ossified near the 

 root, has on one side five square membranous spaces resembling 

 so many panes of glass, above which it is inflated into an os- 

 seous capsule. 



An. histrionica, L.; Enl. 798; Wils. VIII, Ixxii, 4; Edw. 99; 

 Naum. I, c. 52, f. 77; and the female, In. minuta, 799; Edw. 

 197. (The Harlequin Duck.) Ash-coloured; the male fantasti- 

 cally streaked with white; eyebrows and flanks red. Each of the 

 preceding species is occasionally seen in France, but at very 

 long intervals. 

 Then comes the common species with a round or square tail. ' 

 An. clangula, L.; Le Garrot, Enl. 802; the young. An. glau- 

 cion, L.(l) Frisch, 181, 182; Naum. I, c. 55, f. 81, 82; Wils. 

 VIII, Ixvii, 6. (The Golden-eye.) White; head, back, and tail, 

 black; a small spot before the eye and two bands on the wing, 

 white; the bill blackish. The female is ash-coloured with a 

 brown head. The middle of the trachea is considerably dilated, 

 the two arches of the sac, however, preserving their flexibility. 

 It becomes singularly widened near the bifurcation. (2) 



SoMATEKiA, Leach. 



The Eiders have a bill longer than that of the preceding sub- 

 genus, and ascending more on the forehead where it is emarginated 

 by an angle of feathers, but still narrower before than at base. 



An. molissima; L'Eider, Enl. 208, 20 9, the adults of both 

 sexes, Mus. Carls. 39; the threeyear old young male, Edw. 98; 

 Wils. VIII, xci, 2, 3; Naum. 64, f. 79, 80. (The Eider Duck.) 

 Whitish; calotte, belly and tail, black; the female grey, speckled 

 with brown. Celebrated for furnishing us with that valuable 

 article called eider down. (3) 

 After all these distinctions there remains the 



FuLiGULA, Leach, 



Whose beak is broad and flat, but presents no other peculiarity. 

 Sevei-al species are found in France, in all of which the trachea ter- 



(1) Glaucion, the Greek name of a Duck, so called on account of the colour of 

 its eyes. 



(2) Add An. albeola, Enl. 948, the same as Jn. bucephala, Catesb., I, 95; An. 

 brachyptera, Voy. de Freycin. pi. xxxix. 



(3) Add An. spedabilis, Sparm. Mus. Carls,, II, pi. xxxvi; Edw. 154; Naum. 40, 

 f. 58, 59. 



